Overview. Complex carbohydrates are made up of sugar molecules that are strung together in long, complex chains. Complex carbohydrates are found in foods such as peas, beans, whole grains, and vegetables.
Confidence votes 11.2K. Taught College level A&P for 27 years. The lens in the human eye is a convex lens, but it is flexible and when it is acted on by the ciliary muscle around it, the lens can be flattened to change the focus, or, when the muscle is relaxed, the lens can assume a more spherical shape.
OD is thus right eye. 1  The cornea is the outer cover of the eye's hole allowing light in. 2  The iris is the muscle that pulls the opening in the eye (the pupil) open (the coloured bit).  The lens is like an internal pair of glasses that focuses the light that comes through the cornea onto the retina.